Key box of typesetting and casting machines



May 21, 1929. H. ZURCH 1,713,732

KEY BOX OF TYPE SETTING AND CASTING MACHINES Filed May 9, 1927 //0 I /e /a Wm y 1 4 17.72 :1 e12 for Patented May 21, 1929.

warren srArss ATENT OFFICE.

nnnnrann action, or Lnrrzre, GERMANY.

Application filed May 9, 1927, Serial No. 189,890, and in Germany July 28, 1926.

My invention relates to the key boxes of typesetting and casting machines and more especially to a pivoted plate to be used in connection therewith. It is an object of my invention to provide a plate of the kind which will not only guide the dropping space keys but will also remove lead adhering to such keys.

To this end I secure on the inner side of such plate a piece of leather, felt or other comparatively rough wiping material which wipes the lead from the space keys as they drop from the key box.

Pivoted plates as heretofore designed only serve for preventing falling out of the space keys and for guiding them as they drop out. The improved plate according to this invention at the same time removes the undesirable lead particles which have atendency of bulging in the comparatively thin side walls of the matrices so that the matrices soon become unserviceable.

In a preferred embodiment of my invention I provide on the pivot plate a separate frame to which the above mentioned wiping material is secured on the inside, and I provide a resilient connection between the frame and the plate so that the frame is free to yield when a key moves past it, without interfering with the free dropping of the key. On their downward motion the keys will move in contact with the wiping material without being retained, and the lead adhering to the keys will be removed.

The yielding connection between the wiper frame and the pivoted plate also facilitates the return of the plate to its initial position after it has been opened, as the wiper strips project slightly on the inside of the plate and, by striking the walls of the key box, might obstruct the motion of the plate.

In the drawings aflixed to this specification and forming part thereof a pivoted plate embodying my invention is illustrated diagrammatically by way of example.

In the drawings- Fig. 1 is a side elevation,

Fig. 2 is an end elevation, and

Fig. 3 is a plan view of the pivoted plate, with part of the key box,

Fig. 4.- is a section on the line IV-IV in Fig. 1.

Figs. 5 and in Fig. 3, showing the means for liftlng the spacing means in two positions.

6 are sections on the line VV Referrin now to the drawings, 1 is the pivoted plate which'is carried on a pin 2 in the space key box 3. A handle 4: is secured nearthe lower end of the plate to facilitate its operation, and, when in closed position,

the plate is retained by a screw 5 engaging projecting ends of the frame 9 engaged with e the outer face of the plate 1. Two parallel troughs or channels are formed by cutting open the frame 9 at the centre and bending over its innerand outer longitudinal edges and strips 14, 14 of felt, leather or other rough and resilient material are inserted in the channels so as to project slightly from the inner face of the plate when the springs 12 and 13 hold the frame in the recess 8 and to engage the adjacent space key 15, the space keys being supported on curved brackets 18 which are spaced along the walls of the box 8 at some distance therefrom and secured tostrips 23. A. hook 22 is formed at the outer end of each bracket 18. The keys are provided with lugs 16 at their upper ends by which they are supported on the brackets 18, 18. A. pawl 17 having at its upper end a book 19, an inclined. face 20 and a shoulder 21, is adapted to slide at either side of the b x, the usual means, not shown, being provided for operating it. In normal position the spacingkeys 15 are supported on the brackets 18 with their lugs 16, as shown for the first key in Fig. 5. The key is retained by the book 22 at the end of each bracket 18, but when the pawls 17 are raised, as shown in Fig. 6, their hooks 19 will engage below the lugs 16 of thekey, lifting it from the hooks 22 and allowing it to slide down along the inclined spaces of the pawls 17 17 in contact with the strips 1 1, it on the plate 1, so that any lead adhering to the key is wiped away.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described for ob vious modifications will occur to a person skilled inthe art; 7

I claim V 1. A pivoted plate for space-key boxes comprising a body, a support inserted in said body, resilient material secured to said support on each side facing the key's in the keybox, and a resilient connection between said support and said body. 7

2. A pivoted plate for space-key boxes comprising a body, a frame inserted in a recess of saidvbody, a strip of resilient inaterial secured a to said frame on the side facing the keys in the key boX, and a resilient connection between said frame andsaid body.

3: A-pivoted plate for space-key boxes comprising a body, a frame inserted in a recess of'said body and having lugs at both ends pro ecting beyondsaid recess, a strip of resilient material secured to said frameon the side facing the'keys in the key box,

and a resilient connection between said frame a and said body which is engaging said pro HERMANN Z'URCH. 

